PT0E-12714

Personal Combustible Gas Monitor

GP-03
Operating ManualSafety information
The Personal Gas Monitor Model 03 series (GP-03, OX-03,
CO-03, HS-03) are a gas monitor designed to provide
continuous exposure monitoring of combustible gas (GP-03),
Oxygen (OX-03) or toxic gas (CO-03 and HS-03) inhazardous location.
GP-03: combustible gas monitor
OX-03: oxygen monitor
CO-03, HS-03: toxic gas monitor
Specification for safety• Ex ia IIB T4…T3 Ga• Ex ia I Ma•
II 1 G Ex ia IIB T4…T3 Ga
I M 1 Ex ia I Ma
• Ambient temperature range : -20°C to +50°C
Electrical data
• T4:Powered by two series AAA size alkaline batteries,
model LR03 by TOSHIBA or model MN2400/PC2400
by DURACELL.
• T3:Powered by two series AAA size Ni-MH
batteries, model eneloop by Panasonic.
Certificate numbers• IECEx Certificate number : IECEx DEK 13.0092• ATEX Certificate number : DEKRA 13 ATEX 0229
List of standards
・IEC 60079-0:2017
・IEC 60079-11:2011
・EN IEC 60079-0:2018
・EN60079-11:2012
・EN50303:2000

WARNING• Do not replace batteries in hazardous location.
• Do not attempt to disassemble or alter the instrument.
• Use only with two series connected Alkaline AAA
batteries, type LR03 manufactured by Toshiba or type
MN2400/PC2400 by Duracell, or use two seriesconnected chargeable battery type eneloop
manufactured by Panasonic.
• T4:type LR03 manufactured by Toshiba and
MN2400/PC2400 by Duracell. T3: type eneloop
manufactured by Panasonic.
INST. No. 0 0 0 0 0 0 0 0 0 0 0
AB C
DE
A: Manufacturing year (0-9)
B: Manufacturing month(1-9,XYZ for Oct.-Dec.)
C: Manufacturing lot
D: Serial number
E: Code of factory

Phone
Fax
E-mailWeb site: +81-3-3966-1113: +81-3-3558-9110 GIII
: intdept@rikenkeiki.co.jp: https://www.rikenkeiki.co.jp

<Contents>
1 Outline of the Product .............................. 3
1-1. Preface ............................................. 3
1-2. Purpose of use ................................. 3
1-3. Definition of DANGER, WARNING,
CAUTION, and NOTE ...................... 4
1-4. Checking standards andexplosion-proof specifications .......... 4
2 Important Notices on Safety ..................... 5
2-1. Danger cases ................................... 5
2-2. Warning cases .................................. 5
2-3. Precautions ...................................... 6
3 Product Components ............................... 8
3-1. Checking the package ...................... 8
3-2. Names and functions for each part ... 9
4 How to Use ............................................ 11
4-1. Preparation for start-up .................. 11

4-2. Power-on and power-off ................. 12
4-3. Performing air calibration ................ 13
4-4. How to detect.................................. 14
4-5. Seeing information .......................... 15
5 Operations and Functions ...................... 17
5-1. Gas alarm activation ....................... 17
5-2. Fault alarm activation ..................... 19
5-3. Data logger function ....................... 19
6 Maintenance ........................................... 20
6-1. Maintenance intervals and items .... 20
6-2. User mode ...................................... 22
6-3. How to clean ................................... 27
6-4. List of recommended regularreplacement parts ........................... 27
6-5. Filter replacement ........................... 28
7 Storage and Disposal ............................. 291

7-1. Procedures to store the gas monitor orleave it for a long time .................... 29
7-2. Procedures to use the gas monitor
again .............................................. 29
7-3. Disposal of products ....................... 30
8 Troubleshooting ..................................... 32
9 Product Specifications............................ 33

2

1

Outline of the Product1-1. Preface
Thank you for choosing our personal
combustible gas monitor GP-03 (hereinafterreferred to as the gas monitor). Please checkthat the model number of the product you
purchased is included in the specifications on
this manual.

1-2. Purpose of use
This product is a single gas monitor used todetect combustible gases (%LEL) in the air.
Detection results are not intended toguarantee life or safety in any way.

This manual explains how to use the gas
monitor and its specifications. It contains
information required for using the gas
monitor properly. Not only the first-time users
but also the users who have already used the
product must read and understand theoperating manual to enhance the knowledge
and experience before using the monitor.

31-3. Definition of DANGER, WARNING,
CAUTION, and NOTE
Throughout this manual, the following
indications are used to ensure safe andeffective work.
DANGERWARNINGCAUTION
NOTE

1-4. Checking standards andexplosion-proof specifications
The product specifications will vary depending on
the specific standards and explosion-proof
certification.
Check the actual product specifications before use.
For CE marking models, refer to the Declaration ofConformity at the end of this document.
For product specifications, refer to the nameplateattached to the rear of the product.

This message indicates that improper
handling may cause serious damageon life, health or assets.
This message indicates that improper
handling may cause serious damage
on health or assets.
This message indicates that improper
handling may cause minor damage on
health or assets.
This message indicates advice on
handling.

EX mark
CE mark

Typical nameplate for ATEX/IECEx specification

4

2

Important Notices on Safety
2-1. Danger cases

2-2. Warning cases

DANGER
About explosion-proof
 Do not modify or change the circuit or structure, etc.
 Do not use the gas monitor for anything other thandetecting combustible gases in the air.
 When using the gas monitor in a hazardous area,take the following countermeasures for preventing
dangers resulting from electrostatic charges.
(1) Wear anti-static clothes and conductive shoes(anti-static work shoes).
(2) For indoor use, use the gas monitor while
standing on a conductive work floor (with aleakage resistance of 10 MΩ or less).
 The gas monitor has a different explosion-proof
class depending on the battery type.
Because it has a different certificate number too,
check the battery number against the certification
plate number before use.
 Replace the batteries in a non-hazardous area.
 Use only the batteries specified by RIKEN KEIKI on
this gas monitor.

WARNING
Fresh air adjustment in the atmosphere When the fresh air adjustment is performed in theatmosphere, check the atmosphere for freshness
before beginning the adjustment. If other gases
exist, the adjustment cannot be performed
properly, thus leading to dangers when the gas
leaks.
Battery level check Before use, check that there remains sufficientbattery power. When the gas monitor is not used fora long period, the batteries may be exhausted.
Replace them with new ones before use.
 If a low battery voltage alarm is triggered, gas
detection cannot be conducted. If the alarm istriggered during use, turn off the power andpromptly replace the batteries.

5CAUTION
 Do not place the gas monitor where water or dirt
gets accumulated. The gas monitor placed at sucha location may cause malfunction due to water or
dirt that gets into the buzzer opening.
Do not use the gas monitor in a place where thetemperature drops below -20ºC or rises over 50ºC.
 The operating temperature of the gas monitor is -20
to 50ºC. Do not use the gas monitor at higher
temperatures, humidities, and pressures or at lower
temperatures than the operating range.
 Avoid long-term use of the gas monitor in a place
where it is exposed to direct sunlight.
 Do not store the gas monitor in a sun-heated car.
Do not use a transceiver near the gas monitor.
 Radio wave from a transceiver near the gas
monitor may disturb readings. If a transceiver isused, it must be used in a place where it disturbs
nothing.
 Do not use the gas monitor near a device that emits
strong electromagnetic waves (high-frequency or
high-voltage devices).
Never fail to perform a regular maintenance.
 Since this is a safety unit, a regular maintenancemust be performed to ensure safety. Continuing to
use the monitor without performing a maintenancewill compromise the sensitivity of the sensor, thus
resulting in inaccurate gas detection.

WARNING
Others Do not throw the gas monitor into fire.
 Do not wash the gas monitor in a washing machineor ultrasonic cleaner.
 Do not block the buzzer sound hole. No alarmsound can be heard.

2-3. Precautions
CAUTION
Do not use the gas monitor where it is exposed to oil,chemicals, etc. Do not submerge the gas monitor
under water on purpose.
 Do not use in a place where the gas monitor is
exposed to liquids such as oil and chemicals.
 The gas monitor, being compliant to IP67, is notwater-pressure-resistant. Do not use the gas
monitor where a high water pressure is applied to it(under a faucet, shower, etc.) or submerge it underwater for a long time. The gas monitor iswater-proof only in fresh water and running water,and not in hot water, salt water, detergent,chemicals, human sweat, etc.
6

CAUTION
 Whereas the gas monitor can detect different typesof gases, the operating environment may include
gases that have harmful effects on the sensors of
this unit (Different gases can be detected
depending on the sensor).
The gas monitor cannot be used in the presence ofthe following gases:(1) Sulfides (such as H2S and SO2) continuously
existing in high concentrations(2) Halogen gases (such as chloride compounds
and chlorofluorocarbons)(3) Silicone (Si compounds)
Do not use the gas monitor in the presence of theabove gases (such as high-concentration sulfides,
halogen gases, and silicone), which may shorten thesensor life significantly or cause malfunctions suchas inaccurate readings.
In case the gas monitor is used for detection in thepresence of silicone, etc., be sure to check the gas
sensitivities before using it again.
 Do not pick the sensor or buzzer opening with asharp-pointed item. The unit may cause
malfunction or get damaged, possibly resulting inincorrect measurements.
 Do not give strong shock or vibration to the gas
monitor because it is a precision device.

CAUTION
Others Pressing buttons unnecessarily may change thesettings, preventing alarms from activatingcorrectly. Operate the gas monitor using only theprocedures described in this operating manual.
 Do not drop or give shock to the gas monitor. The
water-proof and explosion-proof properties andaccuracy may be deteriorated.

7

3

Product Components
3-1. Checking the package
After unpacking, be sure to check that all theaccessories are included in the package.
 GP-03 (the main unit) Rubber protection cover (pre-attached to themain unit) Alligator clip (pre-attached to the main unit) Batteries (pre-installed in the main unit) Operating manual (this document)

8

3-2. Names and functions for eachpart<Appearance>
Communication port
* Used for the data logger
function. For details, see "5-3.
About data logger function".

Alarm lamp
* Blinks (red) at an
alarm state.

Sensor part* Has a gas sensor at the far
end of the dust filter.

Buzzer sound opening* Sounds intermittent beeps
during switch operation orat an alarm state.

Display (LCD)* Displays the gas
concentration and otherinformation.

Gas name indication* Indicates a gas to be
detected by the gas
monitor.

POWER/MODE button* Used to turn on and off thepower and enter modes.

AIR button* Used to perform air
calibration andoperate in modes.

Rubber protection cover* Protects the main unit.

9

<Appearance><Display>Gas name and information
indication* Indicates a gas to be detectedby the gas monitor and* Used to attach the gas
information such as modes.
monitor to the top of
the pocket.

Alligator clip

Battery level icon
Battery cover* Can be removed byloosening the fixing
screw.

* Displays theremaining battery
power level by the
number of marks.

Operation display* Blinks the heart markat a normal state.

Gas concentration display* Displays the current detection
result.

Information display* Displays information in the display
mode, etc. It usually displays nothing.

10

4

How to Use
4-1. Preparation for start-up

<Installing the batteries>
CAUTION Turn off the power of the gas monitor before
replacing the batteries.
 Replace both of the two batteries with new ones at
one time.
 Pay attention to the polarities of the batteries whenreplacing them.
 Use only the batteries specified by RIKEN KEIKI on
this gas monitor.
 Replace the batteries in a non-hazardous area.

CAUTION
The display is covered by the protective film toprevent scratches from shipping.
Be sure to remove this film before use.
Gas monitor with this film will not satisfy the
explosion-proof performance.

Before starting gas detection, check thefollowings(1) Check that the power is turned off.
(2) Loosen the battery cover fixing screws
and open the cover.
(3) Remove the old batteries and install thenew ones while paying attention to thepolarities.
(4) Close the cover and fasten the fixing
screws.

 Check that the protective film attached on
the display from shipping is removed.
 Check that the batteries are installed.
 Check that the dust filter is free of dust.
 Check that the gas monitor is not damaged.

11

NOTE

 When powering on after leaving the gas monitor for
more than five minutes with the batteries removed,
such as when powering on for the first time or
replacing the batteries, the monitor enters the clock
adjustment mode. In this case, see "6-2-1. Timesettings" to set the date and time.
* Open the clip

* Open the battery cover
NOTE When the communication port of this gas monitor andanother gas monitor is in the place of symmetrical, do
not turn on the power.
The status of gas monitor suddenly may move thecommunication mode "TRANS PC".
In that case, turn off the power once.
After that, then turn it on again.
At that time, so as the each other communication port is
not to the place of symmetrical, be careful.

4-2. Power-on and power-off<How to power-on>
Press the POWER button until the buzzer
blips. After the LCD display switches asfollows, the gas monitor enters the detectionmode.
All lights ON->Date and time->Battery
voltage->Detection range->1st alarm
setpoint value->2nd alarm setpointvalue->Detection mode (Blip Blip)<How to power-off>
Keep the POWER button pressed until thebuzzer blips three times (Blip Blip Blip) fromthe TURN - OFF display and the LCD turns
off.
12

4-3. Performing air calibration

Item
DetectionMode

WARNING
When the air calibration is performed in theatmosphere, check the atmosphere for freshness
before beginning the air calibration. If other gases
exist, the adjustment cannot be performed properly,
thus leading to dangers when the gas leaks.

LCD

Details* Check that the gas
monitor is in thedetection mode.

AIR
AIR HOLD

CAUTION Perform air calibration under pressure andtemperature/humidity conditions close to those in
the operating environment and in fresh air.
 Perform air calibration after the reading isstabilized.
 If there is a sudden temperature change of 15ºC or
more between the storage and operation locations,
turn on the power of the gas monitor, let it leave forabout 10 minutes in a similar environment to theoperation location, and perform air calibration in
fresh air before using it.

AIR
ADJ


Returns to
the detection
mode

NOTE

If the air calibration fails, AIR - FAIL is displayed on the
LCD. Press the POWER/MODE button to reset the alarm(calibration failure). When the alarm is reset, the value
before air calibration is displayed.
13* Keep the AIR buttonpressed until the LCD
display switches fromAIR - HOLD (1st buzzer
sound, blip) to ADJ(2nd buzzer sound,blip) and then release
the button.

* After adjustment, it
automatically returns to
the detection mode.

4-4. How to detect
After air calibration, attach the gas monitor to
the top of the breast pocket with the alligator
clip not to hide the sensor. The detection
mode is used for normal operations.
The gas monitor consists of the following modes.

NOTE

 Open the clip as shown in the rightfigure and attach it to the top of thebreast pocket, etc.
 The clip can be turned by 45
degrees at a time.

Detection mode
When the gas concentration displays
less than the alarm setpoint, thealarm can be reset by pressing any
button down.

After air calibration is successfullycompleted, it automatically returns to
the detection mode.

Gas alarm <Self-latching>

Air calibration mode
Keep the AIR
buttonFault alarm <Self-latching>Press theMODE
buttonTurn off themonitor and takean appropriate
actiondepending on
the failure.
14

Display mode

Pressing the
MODE button or
performing nooperations formore than 20
seconds returns
the gas monitor
back to thedetection mode.

4-5. Seeing information
Press the MODE button to enter the display
mode. Every time the MODE button ispressed, various pieces of information aredisplayed in turn. The gas detection isrunning in the background in this mode. If theconcentration of detected gas exceeds thealarm setpoint value, the gas monitor
automatically returns to the detection mode.
Item
Detection
Mode

LCD

MODE
Displays thefull scale ofthis monitor.

MODE
Date andtime
Displays theinternal clock

Details

MODE
Returns to
the detection
mode.

MODE
PEAK
Displaysmaximum
value
detected frompower-on to
the present.

* When the monitor
displays the full scale,
1st and 2nd alarm
setpoint values are
displayed alternately
every time the AIR
button is pressed.

F.S.

* To clear the peakvalue, press and holdthe AIR button until the
HOLD display
disappears.

15

NOTE

 If no switch operations are performed, the monitor
automatically returns to the detection mode in about
20 seconds.
 If no switch operations are performed, the backlight is
automatically turned off in about 30 seconds (except at
an alarm state).
 When the gas monitor displays the full scale, hold AIR+ MODE buttons down to perform the alarm test.

16

5

Operations and Functions
5-1. Gas alarm activation
An alarm is triggered when the concentrationof the detected gas reaches or exceeds thealarm setpoint value <Self-latching
operations>.
<Alarm activation>
Alarm type
LCD
Operation
Buzzer: SlowFirst alarm
Setting: 10%LEL

Second alarm
Setting: 50%LEL

Buzzer: Fast
intensitychangeLamp/Vibration:
Fast andintermittent
Display:
Concentration
display
blinking
Displays
ALRM

intensitychangeLamp/Vibration:
Slow andintermittent
Display:

Over alarm
Setting: 100%LEL

Concentration
display
blinking
Displays
WARN

Buzzer: Fast
intensitychangeLamp/Vibration:
Fast andintermittent
Display:
Concentration
display
blinking
Displays
OVER

17

<How to reset the alarm>
After the concentration of detected gas
settles below the alarm setpoint value, press
any button to reset the gas alarm.
NOTE Even if the concentration of detected gas returns to
below the alarm setpoint value, the operations ofbuzzer, lamp and vibration continue (self-latching)until any button is pressed (the alarm is reset).
 The alarming type of OVER alarm is self-latching(even the OVER display is latched). Press any button
to reset the alarm. If the gas concentration is lower
than the full scale at the reset, the gas concentration
display appears again. If it is over the full scale, an
OVER alarm occurs again.

18

5-2. Fault alarm activation
A fault alarm is triggered when the monitor
detects abnormalities <Self-latching
operations>.
Determine the causes and take appropriate
actions.
If the gas monitor has problems and isrepeatedly malfunctioning, contact RIKEN
KEIKI immediately.
<Alarm activation>
Alarm type
LCD display
Operation(example)
Buzzer: Intermittent
Low battery
Lamp: Blinking
voltage alarm
Vibration: None

5-3. Data logger function
The gas monitor has a function that records
logs of calibration history, trend and event
history.
Data logger
Interval trend
1800 data
specifications (5 hours at 10 second intervals, 150 hours
at 5 minute intervals)
Alarm trend 1 record (15 minutes before
and after at 5 second intervals)
Alarm event
20 records
Fault event
20 records
Calibration history
20 records

The data logger management program(option) is required to use this function.
Contact RIKEN KEIKI if it is needed.
* For details on the operation, see Operating Manual"Data Logger Management Program".

Display:
Concentration
display
blinking
Displays anerror message* For details on the fault alarm type, primary causes, andappropriate actions, see "8. Troubleshooting".

19

6

Maintenance Regular maintenance:
Perform maintenance once or more every
six months to maintain the performance asa safety unit.

The gas monitor is an important instrument
for the purpose of safety.
To maintain the performance of the gas
monitor and improve the reliability of safety,
perform a regular maintenance.
Contact RIKEN KEIKI if it is needed.

Maintenanceitem

6-1. Maintenance intervals and items
Regular maintenance must be performed atshorter intervals specified either in laws
according to your usage environment or by
RIKEN KEIKI.

Maintenancecontent

Battery level Check that thebattery level issufficient
ConcentraCheck that thetion display air is fresh andthe concentration
display value is
zeroFilterCheck that the
dust filter is freeof dust and not
damaged Daily maintenance: Perform maintenancebefore beginning to work.
 Monthly maintenance:
Perform alarm test once a month.
20

Daily
maintenance

Monthly
maintenanceRegularmaintenance

○

○

○

○

○

○

○

○

○

Alarm testSpanadjustment
Gas alarm

Check that thealarm lamp andbuzzer operate
normally byusing the alarm
test function
Perform the span
adjustment byusing thecalibration gas
Check that thegas alarm iscorrectly
triggered using
the calibration
gas

-

○

○

-

-

○

-

-

○

21

6-2. User mode
The user mode is used for maintenance suchas setting the time.
Press the POWER button while pressing the AIR
button, and release the buttons when the buzzer
beeps. The monitor enters the user mode.

Item
A-CAL
Auto calibration

M-CAL
Manual calibration

WARNING
After the adjustment is completed, do not forget toreturn to the detection mode.
(If the gas monitor remains in the regular maintenancemode, it does not automatically return to the detection
mode.)Item
DATE
Date and time
settings

AIR
Air calibration

LCD

ROM
Displays the
program number

Details
See "6-2-1. Timesettings"

START
Starts booting

See "6-2-2. Air
calibration"

22

LCD

Details
See "6-2-3. Autocalibration"

See "6-2-4. Manual
calibration"* Press the POWER
button to display
the program
number. Confirm
the number andthen press the
POWER button to
return to the user
menu.
* Press the POWER
button to return tothe detection
mode after
booting.

6-2-1. Time settings
Set the date/time of the internal clock.
Item
LCD
Details
DATE

6-2-2. Air calibration
Perform air calibration in fresh air.
Item
LCD
DetailsAIR

POWERPOWER* Use the AIR button tochange the blinking
items and the POWER
button to confirm thechange.
Set Year, Month, Day,
Hour, Minute in thisorder. The clock starts
when Minute isconfirmed.

Date and
time


AIR


DATE

* Press and hold the
AIR button until the
LCD display switchesfrom AIR - HOLD (1stbuzzer sound, blip)
to ADJ (2nd buzzer
sound, blip) and thenrelease the button.

Gas
Concentration
Display* After adjustment, themonitor returns to theuser mode menu.

23* After adjustment, themonitor returns to theuser mode menu.

6-2-3. Auto calibration
This is how to preset the concentration of the
prepared span calibration gas to the gas
monitor and perform calibration in a single
step.
Item
A-CAL

LCD

* Waiting for gas
introduction.

A-CAL(Blinking)↓Present
Concentration
Value Display

Details

POWERPASSPOWER

Adjustment
Value Display

POWER* Default setting
50%LEL* How to change
default setting.
First, press the AIR+MODE Button.
Then, press AIR for
to change.
Finally, press MODE
for to enter.


A-CAL

24

* Starts the gas
supply. After 60
seconds, press the
POWER button. It is
automaticallyadjusted to thepreset value.
* After span
adjustment, themonitor displays
PASS and thenreturns to the user
mode menu.
* If span adjustment is
faulty, GAS NAME FAIL is displayed.
Press the MODE
button to reset.
* Stops the gas
supply.

6-2-4. Manual calibration
This is how to perform calibration withmanually set to the concentration value of the
prepared span calibration gas.
Item
M-CAL

LCD


* Press the POWER
button to confirm theadjustment value.

POWER

Details* After span
adjustment, themonitor displays
END and thenreturns to the user
mode menu.
* If span adjustment is
faulty, GAS NAME FAIL is displayed.
Press the MODE
button to reset.

END

POWER* Waiting for gas
introduction.

Concentration
Display(Blinking)





M-CAL

* Press the AIR button
to increase the value
for the settings 60
seconds after
starting the gas
supply (AIR + MODE
to decrease the
).
value
25

* Stops the gas supply.

<Equipment required for gas calibration>
 Span calibration gas CH4 or i-C4H10(air base)*1
50%LEL (recommended) Gas sampling bag
 Polyurethane tube
 Pump with the flow adjustment function<adjustable to 500±10mL/min> (by pump,flow meter or valve)<Connection between
components>
Connect as shown in the
figure on the right andadjust the flow.
Attach the gas sampling
bag whenever gas
introduction is required.

 Stopwatch
 Calibration cap (option) *2*1 Depend on the monitor type.
*2 Use a dedicated calibration cap (option).
* The customer is required to provide all except for*2.

Within a total tube length of 1 m

Gas samplingbag

Calibration cap

GAS INGAS OUT
Pump with the flow adjustment function<Caution> Leave GAS OUT open.
(by pump, flow meter or valve)<Caution> Adjust the flow to 500±10mL/min.
26

6-3. How to clean
Clean the gas monitor if it becomes
extremely dirty. The gas monitor must be
turned off while cleaning it. Use a waste clothetc., to remove dust.
Do not use water or organic solvent forcleaning because they may cause
malfunctions.

NOTE

The replacement intervals are recommendation only. Theintervals may change depending on the operating
conditions.
These intervals do not mean the warranty periods either.
*** The result of the daily or regular maintenance may
determine when to replace the parts.

6-4. List of recommended regularreplacement parts
Name
Gas
sensorRubberseals
Waterproof
filter

Maintenanceintervals

Replacement
intervals

Quantity(pieces per
unit)

Remarks

6 months

3 years

1*-

2 years

1 set*

Before andafter use

6 months or
whencontaminated14123-6394-40* The operation must be checked after replacement by aqualified service engineer. For the stable operation of
the gas monitor and safety, ask a qualified service
engineer to take care of replacement of the parts
whose operation must be checked. Request RIKEN
KEIKI for operation check.
27

6-5. Filter replacement
Replace the filter if it is contaminated. Follow
the replacement procedure given below.

(4) Open the case.
(5) Remove the rubber seal and filter
referring to the below figure, andreplace them with new ones.

CAUTION
Turn off the power of the gas monitor before replacing
the filter.

CAUTION
When you are inserting thepacking to gas monitor, notethe direction . Refer to thefigure on the right.

(1) Check that the power is turned off.
(2) Remove the rubber protection cover.
(3) With the display facing downward,
remove four screws.

Rubber seal
Sensor side
Filter CF-1821
Upper case side(6) After replacement, reattach the caseand tighten the screws.

Rubber seal
Water-proof filter

CAUTION
When reattaching the case, be careful not to catch
foreign matters by the rubber seal around the case.

Upper case(7) Attach the rubber protection cover.

28

7

Storage and Disposal
7-1. Procedures to store the gas
monitor or leave it for a long time
The gas monitor must be stored under thefollowing environmental conditions.
(1) In a dark place under the normal
temperature and humidity away fromdirect sunlight(2) In a place where gases, solvents orvapors are not present
Store the gas monitor in a shipping carton, if
any, in which the product was delivered.
Store the gas monitor away from dust, etc., if
the shipping carton is not available.

CAUTION
If the gas monitor is not used for a long time, store it
after removing the batteries. Battery leaks may resultin fire or injury.

7-2. Procedures to use the gas
monitor again
When you use a stopped or stored gas
monitor again, never fail to perform a gas
calibration. For information on readjustment
including gas calibration, please contact
RIKEN KEIKI.

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7-3. Disposal of products
When the gas monitor is disposed of, it mustbe treated properly as an industrial waste inaccordance with the local regulations.
<Disposal of Batteries>• When disposing of the gas monitor in EU
member states, sort the batteries as
specified. Handle the removed batteries
according to the classified refuse collection
system and recycling system based on theregulations of EU member states. Contact
RIKEN KEIKI to dispose of the gas monitor.

30

Removing batteries
See Section 4-1 "Preparation for start-up"
and take out the batteries.
Batteries
Specifications

Type

Dry battery

Alkaline dry battery

Rechargeable battery

Nickel metal hydride battery

NOTE

 The gas monitor contains batteries.
 Crossed-out recycle dustbin markThis symbol mark is indicated on the products whichcontain the batteries which fall under EU Battery Directive
2006/66/EC. Such batteries need to be disposed of as
specified by the latest Directive.
This symbol mark indicates that the batteries need to be
separated from the ordinary waste and disposed ofappropriately.
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8

Troubleshooting
The troubleshooting does not explain thecauses of all the malfunctions which occur on
the gas monitor. This simply helps to find thecauses of malfunctions which frequently
occur.
If the gas monitor shows a symptom which is
not explained in this manual, or still has
malfunctions even though remedial actions
are taken, please contact RIKEN KEIKI.
Symptoms

CausesActions

Systemabnormalities
SYSTEM FAIL
Sensorabnormalities
SENSOR FAIL

A circuitabnormality
occurred.
A sensor has
failed.

Request RIKEN
KEIKI for repair.
Request RIKEN
KEIKI for repair.

32

A low battery
voltage alarm isdisplayed.
BATTERY FAIL

The battery levelis low.

Fresh airadjustment
cannot be
performed.
AIR FAIL
Span
adjustment
cannot be
performed.
CH4 FAIL
Clock
abnormalities
CLOCK FAIL

Fresh air is not
supplied aroundthe gas monitor.
Span calibration
gas withappropriate
concentration is
not supplied.
Abnormalities of
the internal clock
The gas monitor
is left for a longtime with thebatteries
removed (or withdead batteries).

Turn off the power
and replace the drybatteries with newones in a
non-hazardousarea.
Supply fresh air.

Supply spancalibration gas withappropriate
concentration.
Make a setting ofDate/Time. If sucha symptom isobserved
repeatedly, thebuilt-in clock isseemingly
malfunctioning.

9

Product Specifications
Detection
principle
Gas to be
detected *1
Concentration
display
Detection
range
Display
resolution
Detection
methodAlarm
setpoint value
Displays
Responsetime (under
the sameconditions)
Gas alarmtype

New ceramic catalytic typeGas alarm
displayi-C4H10 or CH4
Gas alarm
activation
Fault
alarm/self
diagnosis

LCD digital display (seven-segment +symbol)0 to 100%LEL
1%LEL

Fault alarm
display
Fault alarm
pattern
FunctionsDiffusion type
10%LEL(1st)/50%LEL(2nd)/100%LEL(OVER)
Battery level icon
90% response: within 30 seconds

Power supply
Continuous
operatingtime

2 gas alarm (1st/2nd), OVER

Operatingtemperature
33

Lamp blinking, intermittent buzzer
sounding, gas concentration display
blinking, and vibration
Self-latching (Non latching after reset)
System abnormalities, sensor
connection abnormalities, battery
voltage drop, calibration failure, andclock abnormalities
Lamp blinking, intermittent buzzer
sounding, and detail display
Self-latching
LCD backlight, peak display, and dataloggerAAA alkaline dry batteries x 2 (or AAA
Ni-MH batteries <Eneloop> available)
About 35 hours (25ºC, no alarm and nolighting, alkaline dry batteries)
About 30 hours (25ºC, no alarm and nolighting, Ni-MH batteries)-20 to +50ºC

Operating
humidities
Explosion-pro
of structure
Explosion-proof class *2

Below 90%RH (Non-condensing)

AuthenticationsExternal
dimensions
WeightIECEx, ATEXIntrinsically safe explosion-proof
structure
ATEX
Ⅱ1 G Ex ia ⅡB T4…T3 Ga,
ⅠM 1 Ex iaⅠMa
IECEx
Ex ia ⅡB T4…T3 Ga, Ex iaⅠMa

Approx. 54 (W) x 67 (H) x 24 (D) mm(projection portions excluded)
Approx. 80 g (clip excluded)* Specifications subject to changes without notice.

*1 A gas to be detected depends on the monitor type.
*2 Applicable ignition temperature is T3 for therechargeable battery type and T4 for the dry battery
type.

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